Weighing-scale.



G. M. STURGIS.

WEIGHING SCALE.

APPLIUATION FILED AUG. 29, 1910.

993,906. Patented May 3o, 1911.

CHARLES MERCER STURGIS, OF vIBIIIEtMINCH-IAM, ALABAMA.

WEIGrI-IINGr-SCALE.

Specification of Letters Patent.

Application iled August 29, 1910.

Patented May 30, 1911.

Serial No. 579,371.

To all whom 'it may concern:

Be it known that I, CHARLES M. STURGIS, a citizen of the United States,and a resident of Birmingham, in the county of Jefferson and State ofAlabama, have invented a new and Improved Weighing-Scale, of which thefollowing is a full, clear, and eX- act description.

Among the principal objects which the present invention has in view are:to provide a balancing mechanism for a scales platform which issimplified, economical and durable; to provide in a construction of thecharacter described a rocking beam eXtensible at a cost proportionate tothe dimension; and to provide a scale beam lever which is constructedand arranged to support in part the weight of the rocking shaft. Oneembodiment of the present invention is disclosed in the struct-ureillustrated in the accompanying drawings, in which like characters ofreference denote corresponding parts in all the views, and in which-Figure 1 is a vertical cross section of a weighing scales mechanism anda pit therefor, constructed and arranged in accordance with the presentinvention; Fig. 2 is a longitudinal section in plan, and on a reducedscale, of a balancing mechanism constructed and arranged in accordancewith the present invention; Fig. 3 is a detail view, on an enlar-gedscale, of a bracket arm and lever connecting plate therefor; Fig. 4 is adetail view, on an enlarged scale, of the rocking bar of the balancingmechanism and connecting collars therefor, Fig. 5 is a detail view, onan enlarged scale, of a supporting arm and knife edge pivot thereforemployed to support the scale beam lever; and Fig. 6 is a. detail view,on an enlarged scale, of a modified form of the rocking bar shown inconjunction with the scales beam lever employed in the presentinvention.

The present invention is an improvement upon the construction shown inan application for patent upon weighing scales filed by me the 19th dayof April, 1910, and bearing Serial No. 556369, to which cross referenceis here made.

The weighing scales lever 11 in the present invention is provided with asupporting head 12. The supporting head 12 is eX- tended and providedwith a down-turned knife edge pivot 13. The pivot 13 mounted on the head12 is alined with the pivots 13 mountefl on the ends of short supportingarms 14, 14. The arms 14, 14 are usually arranged in pairs, as shown inFig. 2 of the drawings, and are secured to a rocking bar 15 by means offeathers 16, and are prevented from shifting laterally thereon by setscrews 17. By this construction the arms 14, 14 may be applied to thebar 15 at any convenient point thereon without reference to the otherdevices supported on the said bar 15. The arms 14, 14 and the head 12form the supports for the rocking bar 15, and the knife edge pivots 13,13 depended fromeach of the said arms rest upon pivot plates 18, 18disposed at the top of posts 19, 19. The posts 19, 19 are preferablyconstructed of masonry, and are erected upon the bottom of the scalespit, as seen in Figs. 1 and 2 of the drawings.

The scales beam lever 11 is connected by means of an eyelet 2O on anadjusting block 21, with a platform scales steelyard, whereon theweighing devices are adjusted for balancing the weighing scales. Theplatform 22 in the present invention is shown as having railway trackrails 23, 23 mounted thereon, the drawings showing the invention asapplied to what is known as a railway scales. The platform 22 issupported upon heavy beams'24, 24, which beams are extended lengthwiseof the platform and parallel with the rocking bar 15. The said beams aresupported upon levers 25, 25 and upon knife edge pivots 26, 26 mountedthereon, as shown best in Fig. 1 of the drawings. To rest upon thepivots 25, 25 the beams are provided with shoes 27, 27 the undersurfaces whereof are preferably grooved, as shown in the drawings.

The levers 25, 25 are suspended from the rocking bar 15 on the one endand from plates 28, 28 on the other end. The plates 28, 28 and the saidlevers 25, 25 are connected by means of staples 29, 29 and swingingloops 30, 30. The loops 30, 30 are-each provided with two eyelets 31,31, which are provided to fit over and form a bearing for the knife edgepivots 32, 32. The pivots 32, 32 are extended through the body of thelevers 25, 25 and are lixedly held therein. In this manner is supportedthe outer end of each of the levers 25.

The levers 25, 25 are arranged in pairs, alined transversely to the pitso that the inner ends of each of the said levers extend to the medianline of the said pit to engage a triangular plate 33. The levers 25, 25are preferably bifurcated to form heads 34, 3a, between the wings ofwhich heads the said plate 33 extends. Fixedly mounted in and extendedthrough the sides of the heads 3l are knife edge pivots 35, 35. Thepivots 35, 35 are extended through perforations 36, 36 in the plate 33.The perforations 36, 36 are enlarged to permit th-e pivots 35, 35 torock therein. The plate 33 is suspended from lever arms 37, which armsare connected with the rocking bar 15 by means of feathers 38, as shownbest in Fig. 3 of the drawings. rllhe arms 37, 37 may be disposed at anypoint upon the rocking bar 15, being secured thereto only by thefeathers 38 and set screws 39.

The construction thus far described whereby the arms lll, 12 and 37 aremounted on the rocking bar 15, provides for varying the construction ofthe scales to sizes great or small, as may be desired, all that isnecessary to vary the size being to add shaft sections of greater orlesser length, or of greater number to form the rocking bar 15. Theshaft sections forming the rocking bar 15 are united by means of collars40, 10. The collars l-O, l0 are slidably mounted on the shaft sectionsforming the bar 15, and are non-rotatably secured thereon by means offeathers ll1, ll. The collars 40, 40 are provided with tapered grooves42 to receive a tapered key 43. rlhe grooves l2 aline to receive thesaid keys 43, and are held in united relation by screw bolts 14, 14. Thecollars 40 are each provided with a set screw ll5 which prevents theshifting of the collars longitudinally on the shaft sections.

By means of the construction wherein are used shaft sections and thecollars 40, 40, the said sections may be cut to suit the pit of weighingscales construction.

In the modified form shown in Fig. 6 of the drawings, the shaft sectionsforming the *rocking bar 15 are substituted by Z- bars 46. The Z-bars 46are Vof lany suitable length, and are preferably lconnected to the arms12, 14C and 37 by angle plates 47, 47, which are bolted to the Z-barsand to the said arms, as shown best in Fig. I6 of the draw-ings.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:-

1. A weigh-ing scales, comprising a Arocking bar embodying a pluralityof longitudinally extended sections; a plurality of collars for unitingsaid sections, said collars being keyed to said sections and providedwith tapered grooves arranged to aline; and a tapered key arranged to bedriven into said grooves when alined.

2. A weighing scales, comprising a rocking bar embodying a plurality oflongitudinally extended sections; a plurality of collars for unitingsaid sections, said collars being keyed to said sections and providedwith tapered grooves arranged to aline; and a tapered key arranged to bedriven into said grooves when alined.

3. A weighing scales, comprising a rocking bar embodying a plurality oflongitudinally extended sections; a plurality of collars for unitingsaid sections, said collars being keyed to said sections and providedwith tapered grooves arranged to aline; a tapered key arranged to bedriven into said grooves when alined; a scales beam lever lixedlymounted on said rocking bar; a short supporting head. for said leverhaving a pivot lixedly mounted on said rocking bar; a plurality of shortsupporting arms for said rocking bar, said arms being provided withperforated ends adapted to slide over said sections; a plurality ofknife edge pivot points one mounted on each of said supporting arms atequal distance from the center of the perforation formed in the endthereof; means for preventing the rotation of said arms on saidsections; a plurality of pivot posts erected on the scales structure,and having seats for said pivot members to hold the same in alinement;and suitable connections between said lever and the steelyard of thescales.

et. A weighing scales, comprising a rocking bar embodying a plurality oflongitudinally extended sections; a :plurality of collars for unitingsaid sections, said collars` being keyed to said sections and providedwith tapered grooves arranged to aline; a tapered key arranged to bedriven into said `grooves when alined; a scales beam lever fixcdlymounted on said rocking bar; a short supporting head for said leverhaving va pivot ixedly mounted on said rocking bar; a plurality of shortsupporting arms for said rocking bar, said arms being provided withperforated ends adapted to slide over said sections; la plurality ofknife edge pivot points one mounted on each of said supporting arms atequal distance from the `center of the perforation formed in the endthereof; means for preventing the rotation of said arms on saidsections; a plurality `of -pivot posts erected on the scales structure,and Ahaving seats for said pivot members to hold the same in alinement;suitable connections between said lever and the steelyard of the scales;a plurality of supporting arms slidably mounted on said rocking bar;

means for iixing the adjustment of said specification in the presence oftWo subarms upon said rocking bar; and a piuscribing Witnesses.

raiity of supporting levers for the scales platform pivotaiiy connectedWith the fixed CHARLES MERCER STURGIS structure and with said supportingarms eX- Witnesses: tended from said rocking bar. JAS. N. MERRELL, Intestimony whereof I have signed this LILLIAN CREWS.

Copies o1' this patent may 'be obtained for ve cents each, by addressingthe Gommissoner of Patents, Washington, D. C.

